diff --git a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
index f876108980..c0977e8af7 100644
--- a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
+++ b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
@@ -7495,7 +7495,8 @@ namespace MediaBrowser.Controller.MediaEncoding
                 {
                     // Progressive download - use faststart for proper seeking and duration
                     // Use frag_keyframe for better seeking compatibility with mpv
-                    format = " -f mp4 -movflags frag_keyframe+faststart+default_base_moof";
+                    // avoid_negative_ts make_zero ensures timestamps start at 0 for better player compatibility
+                    format = " -f mp4 -movflags frag_keyframe+faststart+default_base_moof -avoid_negative_ts make_zero";
                 }
             }